Universal Apps 101

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Goran Karačić

AgendaWho am I?

Introduction to Universal AppsUniversal Apps DemoQuestions

Who am I?Goran KaracicPolytechnic ZagrebWindows Phone developerIce cream addictLady Gaga > Ke$a

Universal Apps Overview

Universal appsApplications that use the overlapping code of theWindows 8.1 and the Windows Phone 8.1 platform

Create new apps or add a WP8.1 app to your existing Windows 8.1 project

Supported for C#, C++ and HTML5/CSS/JS

How much code is shared?

Classes Structs Interfaces

Windows 8.1 SDK 566 119 59

Windows Phone 8.1 SDK

624 131 57

+58 +12 -2

Converting a Windows 8.1 projectAs simple as addinga new project to thesolution

Shared ProjectAllows sharing items between application projects

No binary output

Supports all items:XAMLCode filesImagesXML/JSON

Code Sharing Architecture

Separation of ConcernsDecouple UI from App Logic

Logic in Shared Project+some XAML that makes sense

UI goes into the Windows/WP project+some platform specific logic (geolocation, sensors…)

#if Compiler ConditionalsWindows = WINDOWS_APP

Example: hardware back button (WP only)Windows Phone = WINDOWS_PHONE_APP

#if WINDOWS_PHONE_APP

Windows.Phone.UI.Input.HardwareButtons.BackPressed += this.HardwareButtons_BackPressed;

#endif

Demo

Questions?

Thank you, come again! :D